Due to the paradoxical relationship among operability，optimization efficiency and quality for complex heat exchanger network global optimization，a fractional matching optimization method of complex heat exchanger network was proposed with the optimal temperature principle.The complex network integration problem was decomposed into multi-single fluid matching optimization sub problem based on the number of cold/hot fluid.The network structures were stepwise generated with optimal matching priority principle and the general network structure could be obtained finally.The results showed that optimizing selection matching principle could provide better heat exchanger network structures than enthalpy difference matching and temperature matching for avoiding matching misconduct.This method could greatly improve the operability of complex heat exchanger network and the matching sequence optimizing selection could promote the fractional optimization quality.